:root {
  --primary: #0052D9;
  --primary-light: #E8F0FE;
  --primary-dark: #003DA5;
  --success: #00A870;
  --danger: #E34D59;
  --warning: #ED7B2F;
  --bg-dark: #1B2838;
  --bg-sidebar: #243447;
  --bg-main: #F5F7FA;
  --bg-card: #FFFFFF;
  --text-primary: #1D2129;
  --text-secondary: #4E5969;
  --text-light: #86909C;
  --text-white: #FFFFFF;
  --border: #E5E6EB;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 8px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: 14px; color: var(--text-primary); background: var(--bg-main); }
a { color: var(--primary); text-decoration: none; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-thumb { background: #C9CDD4; border-radius: 3px; }
.login-page { display: flex; align-items: center; justify-content: center; height: 100vh; background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%); }
.login-box { background: var(--bg-card); border-radius: 12px; padding: 48px 40px; width: 400px; box-shadow: 0 8px 32px rgba(0,0,0,0.2); text-align: center; }
.login-box h1 { color: var(--primary); font-size: 24px; margin-bottom: 8px; }
.login-box p { color: var(--text-light); margin-bottom: 32px; }
.login-box select { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 15px; color: var(--text-primary); background: var(--bg-main); appearance: none; cursor: pointer; outline: none; }
.login-box select:focus { border-color: var(--primary); }
.login-btn { width: 100%; padding: 12px; margin-top: 20px; background: var(--primary); color: var(--text-white); border: none; border-radius: var(--radius); font-size: 16px; cursor: pointer; transition: background 0.2s; }
.login-btn:hover { background: var(--primary-dark); }
.login-btn:disabled { background: #A0A0A0; cursor: not-allowed; }
.header { display: flex; align-items: center; height: 56px; background: var(--bg-dark); color: var(--text-white); padding: 0 24px; flex-shrink: 0; }
.header .logo { font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.header .data-month { margin-left: 24px; font-size: 13px; color: rgba(255,255,255,0.7); }
.header .spacer { flex: 1; }
.header .user-info { font-size: 13px; color: rgba(255,255,255,0.8); margin-right: 16px; }
.header button { background: rgba(255,255,255,0.15); color: var(--text-white); border: 1px solid rgba(255,255,255,0.3); border-radius: 4px; padding: 6px 14px; font-size: 13px; cursor: pointer; margin-left: 8px; transition: background 0.2s; }
.header button:hover { background: rgba(255,255,255,0.25); }
.sidebar { width: 180px; background: var(--bg-sidebar); color: var(--text-white); overflow-y: auto; flex-shrink: 0; }
.sidebar h3 { padding: 16px 16px 8px; font-size: 12px; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 1px; }
.sidebar .district-item { padding: 10px 16px; cursor: pointer; font-size: 13px; color: rgba(255,255,255,0.8); border-left: 3px solid transparent; transition: all 0.2s; }
.sidebar .district-item:hover { background: rgba(255,255,255,0.08); }
.sidebar .district-item.active { background: rgba(0,82,217,0.3); border-left-color: var(--primary); color: var(--text-white); font-weight: 600; }
.sidebar .district-item .store-count { float: right; font-size: 11px; color: rgba(255,255,255,0.4); }
.dashboard { display: flex; flex-direction: column; height: 100vh; }
.dashboard-body { display: flex; flex: 1; overflow: hidden; }
.main-content { flex: 1; overflow-y: auto; padding: 20px 24px; }
.kpi-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 20px; }
.kpi-card { background: var(--bg-card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.kpi-card .kpi-label { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.kpi-card .kpi-value { font-size: 28px; font-weight: 700; color: var(--text-primary); }
.kpi-card .kpi-value.profit { color: var(--success); }
.kpi-card .kpi-value.loss { color: var(--danger); }
.kpi-card .kpi-sub { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.kpi-card .kpi-trend { display: inline-block; font-size: 12px; padding: 2px 6px; border-radius: 3px; margin-left: 8px; }
.kpi-card .kpi-trend.up { color: var(--success); background: rgba(0,168,112,0.1); }
.kpi-card .kpi-trend.down { color: var(--danger); background: rgba(227,77,89,0.1); }
.chart-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.chart-box { background: var(--bg-card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.chart-box.full { grid-column: 1 / -1; }
.chart-box h3 { font-size: 15px; color: var(--text-primary); margin-bottom: 16px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.chart-container { width: 100%; height: 320px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.data-table thead { background: var(--primary-light); }
.data-table th { padding: 12px 14px; text-align: left; font-weight: 600; color: var(--text-secondary); white-space: nowrap; cursor: pointer; user-select: none; }
.data-table th:hover { background: #D6E4F9; }
.data-table th .sort-icon { margin-left: 4px; font-size: 10px; color: var(--text-light); }
.data-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.data-table tr:hover { background: rgba(0,82,217,0.03); }
.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.data-table .profit-pos { color: var(--success); font-weight: 600; }
.data-table .profit-neg { color: var(--danger); font-weight: 600; }
.data-table .store-name { color: var(--primary); cursor: pointer; }
.data-table .store-name:hover { text-decoration: underline; }
.tabs { display: flex; gap: 0; margin-bottom: 20px; background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.tab-btn { flex: 1; padding: 12px 20px; border: none; background: transparent; font-size: 14px; color: var(--text-secondary); cursor: pointer; transition: all 0.2s; font-weight: 500; }
.tab-btn:hover { background: var(--primary-light); color: var(--primary); }
.tab-btn.active { background: var(--primary); color: var(--text-white); font-weight: 600; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.advisor-sidebar { position: fixed; right: -480px; top: 56px; width: 480px; height: calc(100vh - 56px); background: var(--bg-card); box-shadow: -4px 0 16px rgba(0,0,0,0.1); z-index: 100; transition: right 0.3s ease; display: flex; flex-direction: column; }
.advisor-sidebar.open { right: 0; }
.advisor-sidebar .advisor-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.advisor-sidebar .advisor-header h3 { font-size: 15px; }
.advisor-sidebar .close-btn { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-light); }
.advisor-sidebar iframe { flex: 1; border: none; width: 100%; }
.advisor-sidebar .advisor-fallback { padding: 40px; text-align: center; color: var(--text-secondary); }
.advisor-sidebar .advisor-fallback a { display: inline-block; margin-top: 16px; padding: 10px 24px; background: var(--primary); color: var(--text-white); border-radius: var(--radius); }
@media (max-width: 1200px) {
  .chart-row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .sidebar { width: 140px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .main-content { padding: 12px; }
}
@media (min-width: 1600px) {
  .kpi-row { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .chart-container { height: 400px; }
}